Bobbin winder protector for sewing machines



G. GREENBERG BOBBIN WINDER PROTECTOR FOR SEWING MACHINES Filed April 2, 1948 Jan. 22, 1952 2 SHEETS-SHEET 1 INVENTORWW z: 7 0/ afar/29 Txql Jan. 22, 1952 r a. GREENBERG ,4

BOBBIN WINDER PROTECTOR FOR SEWING MACHINES Filed April 2, 194a 2 SHEETS-SHEET 2 T -Ii f INVENTOR.

Patented Jan. 22, 1952 BOBBIN WINDER PROTECTOR FOR SEWING MACHINES George Greenberg, Brooklyn, N. Y.

Application April 2, 1948, Serial No. 18,517

5 Claims.

This invention relates to protecting devices for bobbin winders used with sewing machines, and has for its object to provide such a device, which will be simple in construction, inexpensive to manufacture and apply, and efiicient in use.

Other objects of this invention will be apparent as the specification of the same proceeds or will be pointed out therein.

In the drawings forming a part of this speciiication and accompanying the same:

Fig. l is a front elevational view of my improved protector device applied to a bobbin winder, in a closed position; 7

Fig. 2 is a fragmentary front elevational view of the left hand end of it showing a portion of the protective device in an open position;

Fig. 3 is an end view of my device;

Fig. 4 is a plan view of my protective device in a closed position, the bobbin winding equipment being indicated in dotted lines;

Fig. 5 is a front view of the same, the right hand portion of the protector being shown in an open position, and in said last mentioned two figures portions of the same having been removed.

Fig. 6 is a fragmentary sectional view of a detall, the section being as idicated at 68 in Fig. 4.

Referring now to the drawings, more in detail by characters of reference, my device is a specifically constructed protector for the usual bobbin winding apparatus used with certain types of sewing machines.

As is well known to those versed in this art, removable bobbins are used for certain threads in sewing machines, and means are provided whereby the operation of the sewing machine itself will automatically wind thread from a usual spool on the bobbin to be used in the sewing machine when the thread on thebobbin therein has been exhausted.

As it is also well known in this art, and as recited in connection with the device shown in the drawings, a shaft generally indicated by the numeral I 0 is provided at an appropriate place on the sewing machine table, having a free front portion Illa on to which will be pushed a bobbin generally indicated by the numeral II, on which is to be wound the thread in questionsaid bobbin I I to be used in the machine when the bobbin now in operation therein will be exhausted, and means are provided whereby the machine itself will wind the same.

' These means usually consists of a wheel [2 having a rim, grooved as indicated at 13, which normally is in a tight frictional engagement with a belt 14 driving the sewing machine. Obviously,

2 this belt, running in the direction indicated by arrow l5, will rotate the wheel I2 in the direction shown by arrow l6, and will rotate the bobbin in the same direction.

The shaft in is journalled in a specific frame construction I! pivotally mounted as at IS on a base plate H.

The thread to be wound on the bobbin ll usually comes in spools 20 and it may be placed on a support 2! which is adjustably secured on post 22. The thread 23 will be passed through an appropriate hole 24 in an arm25, also ad- ,iustably secured on the post 22, then it will be guided through a ring 26 in the top of my protector device, generally indicated by the numeral 2'! and to be described more in detailpresently, the thread 23 within said protector then running on a pulley 28 specifically constructed for that purpose and the details of which are well known in this art, wherefore there is no need to further describe them. The pulley 28 is secured on a bearing device 29 resting on the bottom plate [9 of my device, and the thread 23 from said pulley will pass along the inside of my protector and on to the bobbin ll.

It will be seen that when the wheel I2 is rotated in the direction of arrow [6 by the belt [4 of the sewing machine, the thread 23 will be pulled against the slightresistance in the specifically constructed spring controlled pulley 28, and will be wound on the bobbin II in a tight condition.

All these operations are automatically performed by the bobbin winding device just described, while the sewing machine is in operation with the earlier filledbobbin used therein. When the bobbin II is entirely filled, means are provided whereby the bobbin winder is separated from the driving belt 14 and will stop the operation.

For this purpose the shaft in with the wheel 12 thereon is journalled in the frame I! as mentioned hereinbefore, said frame being pivotally secured on the base plate l9, its pivot being indicated at l8.

The leg portion l'la of the frame I! is hollow and downwardly open, and a plunger 30 is arranged therein downwardly pressed by a spring 3|. Normally, therefore, plunger 30 pressing against the base plate [9 would tilt the whole frame device IT with the shaft l0 and the wheel l2 thereon into a left hand direction, as viewed in Fig. 2. However, a link mechanism, generally indicated by the numeral 32 is attached to a left hand extension 33 on the supporting and journalling frame ll, said link mechanism being pivotally connected to a left hand anchoring member 34, as indicated at 35, and normally the two members 36 and 31 of that link structure are in a straight line arrangement and counteract in their axial direction the pressure of the plunger and will prevent a left hand tilting of the support frame I! with the said shaft and wheel thereon, so thatthe 'frame remains in a generally'vertical position, as indicated in Fig. l, and the winding of the thread 23 is performed in such a position.

To terminate the winding operation .when the bobbin is filled, a specific arm 38 is secured on the link member 31, the termination of said arm projecting towards and underneath ofthe bobbin 1 l, and will be at a distance from its center equivalent to the thickness of thread windings which it is intended to carry; When said thickness is reached, the tightly wound thread on the bobbin s will press the arm. 38 in a downward direction and thereby move the link member 31in a left hand direction and break the straight line arrangement of the links. It will be. seen that as soon as said straight line. arrangement is broken, the pressure of the spring 3| will exertitself, and will push the frame device I I in aleft hand direction, as. indicatedlin: Fig. 2. This movement will continue until the wheel [2 will come to rest on the supporting table. or the like, for the device indicated at This movement of the wheel 12 will disengage the same from thebelt Id of the sewing machine, andthe wheel !2 will stop its rotation and the further filling of the bobbin ll.

When the bobbin in the sewing machine is used up, the operator will pull off the bobbin ll filled and waiting, and replace it with. the one which was emptied. by the machine, as will be obvious.

After placing the empty bobbin on the device, on shaft- IO, wheel l2 willbemoved into its original positionengaging the belt Land its bobbin filling operation will. start again. For this purpose, in the embodiment shown, an arm 4! is secured on the lowermost link member36 and provides an upward continuation thereof, as indicated in Fig. 2, and the operator will press the same in the: right hand direction, arrow 42, whereby the link mechanism 32 will again be placed into its straight line position shown in Fig. 1, against the action of the plunger 39 and spring 31, and the frame: l will be returned into its normal vertical position, also indicated in Fig. 1.

Obviously, thread 23 will be broken before removing the filled. bobbin. M. and: the end of said thread will be wound a few times around the new bobbin to secure the same thereon and for the starting of the winding. operation. of it therearound. The thread will move in the direction of arrow 3 as also will be obvious.

These automatic-bobbin. Winders for sewing ma chines mostly are used in largemanufacturing establishments, like clothing, dress, underwear and similar factories. In such cases, ailarge number of sewing machines are placed on a long table or adjacent tables, the operator sitting in front of. his machine, and each. given a certain amount of space for the'necessary maneuvers and for placingv receptacles for the ready. article winding devices is broken or will be caused to entangle with different parts of the machinery so that considerable effort and time is needed to restore the device into its operating condition, and very often even the whole sewing machine must be stopped, an expert mechanic called for the repair, and even parts of the device must be removed before the swiftly moving and rotating thread. can be extricated' i from the various parts, and the machinerestored intoworking condition. My device has for its main purpose to avoid all these troubles and losses.

For this. purpose I developed a specifically constructed. protecting cover for such bobbin winder. The cover simply is an elongated rectangular box composedof two parts, a right hand comparatively stationary portion, generally indicated by the numeral 50', and a left hand member, generally'indicated at 5|, which will, in a Way, take part in the bobbin operation and will move with the shaft IB- and wheel l2. 7

The. right hand relatively stationary portion 50 of my novel protector cover for. such bobbin winding, devices, will startv somewhat beyond the thread. guide pulley or roller 28 so as to cover the same: and right hand outermost portion of the thread. 23.. It. will have a right hand end wall 52. In the left hand direction it will. cover the device and will extend to a desired distance and terminate. before the-bobbin I. l, saidleft hand termination thereof being open, as. indicated at 53. It will.have a-front-wall 54., a top 55-, preferably being integral therewith. and, of course, rectangular theretoand saidright hand covering box will also have a: rear wall. 55, which preferably will be made. of a. separate piece independent of the front and top wall, while it may beintegral with the right hand: wall '52 which then will be free of. the front walL The front wall 54 will be hinged toa short. receiving wall 54a secured on the base'plate l8 or being a part thereof, the hinges of the same being indicated at 51.

- The left hand portion 5.1 of my protector box is preferably formed of afront wall 58, an end wall: 59,. and top and it. may not have any rear wall. It will be hinged. to the base i-S- through the end wall. 59, as. indicated. at 61, and otherwise it will. be free of the. base so that it can be moved into an open inclined position swinging on its pivot Bl, as indicated in Fig. 2. An appropriate aperture isprovided in the top 53 thereof, through which the upper end of the bar 44- projects. V The. use and operation of my protector will be obvious to those versed in the. art from the herein description. and the drawings. accompanying the same- However, I. want to offer. the follow.- ing remarks to further explain the same.

Normally the protector is in the closed position. as indicated in Figl, and. in such position it will be obvious that all the operating parts of V the same from being entangled with the thread, 23,. or cause the thread to break or be entangled with other parts of the device, as has been mentioned, and as extremely often is the case now.

The bobbin winding device will operate as usual and as has been described. When the bobbin II is filled, the arm 38 will trip the mechanism as described hereinbefore, and the frame ll with the shaft l and bobbin II will swing in a left hand direction, as indicated in Fig. 2, until the wheel I2 will come to rest on the support 40, like the table for the machine. This movement, however, will swing the arm 4i also in the left hand direction and said arm will carry the left hand swingable protector portion 5| with it and place it into the open position of Fig. 2.

Now the operator may pull the full bobbin ll off the shaft l0 and replace it by an emtpy one, whereupon the arm 4! will be pressed in a right hand direction, arrow 62, thereby placing the bobbin winding device into the operative position indicated by dotted lines in Fig. 1, and at the same time closing the protector member 5|, as will be obvious.

Sometimes there is need to inspect other parts of the device to adjust, repair or exchange them, or somehow the thread breaks, in which case the right hand relatively stationary portion 50 of my device will be opened by swinging the same forwardly over the pivots 51. In such a position the front wall 54 will rest on the table or support 40 and the top 55 will project therefrom, as indicated by dotted lines in Fig. 4 and by full lines in Figs 3 and 5, and will uncover the hole long right hand portion of the device for any of the purposes mentioned. The end wall 52 and the rear wall 56 may be stationarily secured on the base and may remain thereon when the front and top are open, or the end wall 52 may also move with the front wall 54 and the top 55, as indicated in Fig. 4.

Of course, the left hand portion 5| of the protector which opens at the termination of the bobbin winding and will automatically close when the bobbin winder is returned into operating position, may also have a rear wall not indicated in the drawing, and it will be understood by those versed in the art that such a rear wall when moving the said portion 5| will be provided by an appropriate slot to permit the movement of the shaft therein.

What I claim as new and desire to protect by Letters Patent of the United States, is:

1. In a bobbin winder, a shaft adapted to removably receive a bobbin at one end thereof. means to rotate said shaft with the bobbin thereon and wind a thread on the bobbin, and means actuated when a predetermined thickness of the thread windings on the bobbin is reached to stop said first means, thereby terminating the winding of the thread, a tiltable cover for said shaft and bobbin, and a member also activated by said second mentioned means. adapted to tilt and so open said cover and expose the bobbin when said predetermined thickness of the thread 1 windings thereon is reached.

ing through an opening in said second cover to said pulley.

4. In a bobbin winder, a shaft, a wheel on said shaft, a belt frictionally engaging one side of said wheel whereby upon the running of the belt said wheel will rotate said shaft, a bobbin removably secured on one end of the shaft and rotatable therewith, a frame carrying a bearing for said shaft, a base, said frame being pivoted on said base and tiltable with relation thereto, a spring having a tendency to tilt said frame, a link mechanism having two pivoted links normally in alignment and in such position being adapted to counteract said spring and prevent a tilting of said frame, a member on one of said links reaching adjacent to but spaced from said bobbin in the normal position of said frame, said belt engaging said wheel and rotating said shaft and bobbin and winding a thread thereon, but upon a predetermined thickness of said windings the same engaging said member and moving said links out of alignment, said links then permitting said spring to act tilting said frame and terminating the engagement of said belt with said wheel and the driving of the same, a tiltable cover for said frame, shaft and bobbin, and an element also activated by said member on said link when said thickness of windings is reached, said element then being adapted to tilt said cover and expose said frame, shaft and bobbin.

5. In a device, as set forth in claim 4, said element on said link comprising an extension thereof projecting through a slot in said cover and acting thereon therethrough, the projecting portion of said extension also being adapted to return the parts into their normal position by the same.

GEORGE GREENBERG.

REFERENCES CITED The following references are of record in the file of this patent:

STATES PATENTS Number Name Date 991,816 Ashman May 9, 1911 1,290,225 Karle Jan. '7, 1919 1,302,936 Lefkowitz May 6, 1919 

